apostrophe

Universal Words noun 1 the mark ( ' ) used to show that one or more letters or numbers have been left out, as in she's for she is and '63 for 1963 2 the mark ( ' ) used before or after the letter 's' to show that sth belongs to sb, as in Sam's watch and the horses' tails 3 the mark ( ' ) used before the letter 's' to show the plural of a letter or number, as in How many 3's are there in 9? and There are two m's in 'comma'.